Finding the Fourth Proportional to 67,300, 92,787.74 and 55,155.78

Step by Step Solution

1. Step 1: Write the proportion equation
   67,300 : 92,787.74 = 55,155.78 : x
2. Step 2: Convert to fraction form
   67,300/92,787.74 = 55,155.78/x
3. Step 3: Cross multiply
   67,300x = 92,787.74 × 55,155.78
4. Step 4: Simplify right side
   67,300x = 5,117,779,710.20
5. Step 5: Solve for x
   x = 5,117,779,710.20/67,300
6. Step 6: Final answer
   x = 76,044.28